'Hide and seek'

The boy was playing hide-and-seek with his seven-year-old sister during a visit on Sunday with their father to a friend in a remote part of the Auteuil district of Laval when he went missing, and police said he did not know the area.

On Tuesday, fire fighters searched the banks of the Mille-Iles River, and divers scoured the river and used sonar to scan the bottom.

Police intend to re-interview Adam's seven-year-old sister, the last person reported to have seen him before he disappeared.

Pc Lorrain said on Tuesday none of his clothing had been recovered, the Montreal Gazette reported.